Refactor preference controllers to receive and mutate ZenMode/ZenPolicy

Also fixed a handful of style issues / warnings along the way.

Fixes: 341950853
Fixes: 341910620
Test: atest com.android.settings.notification.modes
Flag: android.app.modes_ui
Change-Id: I65900941fcdf53824caf052fd0a24401c1bfb476
17 files changed